Cutting mechanism for rib applying machine



April 1, 1958 N w. SJOBERG 2,828,495

CUTTING MECHANISM FOR RIB APPLYING MACHINE Filed March 1, 1957 Fig. l

LINE 30- INVENTOR.

g /1% aft-9m CUTTING MECHANISM FOR RIB APPLYING MACHINE Nils W. Sjoberg, Lynn, Mass, assignor to Prime Mannfacturing Company, Lynn, Mass., a corporation of Massachusetts Application March 1, 1957, Serial No. 643,271

Claims. c1.12-20 This invention relates to rib applying machines for preparing welt insoles by adhesively attaching the required sewing rib to otherwise flat insole blanks. The invention comprises new and improved mechanism for cutting off the rib stripping at the conclusion of the applying operation so constructed and arranged that the operator is substantially relieved of physical effort in completing the severing operation.

l-leretofore machines for applying rib stripping by the well known prime system have included treadle operated cutting mechanism, and while this has satisfactorily performed its function it has been found somewhat tiring by the operator toward the end of a full days work. The mechanism of the present invention remedies this difficulty as well as improving the speed and accuracy of the severing operation.

For purposes of illustration the cutting mechanism is herein shown as embodied in a machine in which a knife and rib gripping jaws are carried and actuated by a treadle-operated slide. A source of power, such as a solenoid, is arranged to be cut into the connecting train of mechanism between the treadle and the knife slide, and means under the control of the operator are provided for causing this action to take place at the proper time. The actual severing of the rib thus occurs as a power operation timed by the operator.

These and other features of the invention will be best understood and appreciated from the following description or" a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. 1 is a view of the machine in elevation with parts in section,

Fig. 2 is a fragmentary view in perspective suggesting the position of the knife and gripping jaws preparatory to the severing operation, and

Fig. 3 is a plan view of the knifeslide and associated parts.

As herein shown the machine has a column upon which is mounted a freely rotatable, roll 11 serving as a sole support. A pair of feed feet 12 are also mounted in the column and operate alternately to engage the ribbing strip as it is applied to the sole blank, pressing the two together and advancing them toward the left as shown in Fig. 1. A strip guide foot 13 is mounted adjacent the feed feet in position to direct the rib stripping 14 to the surface of an insole 15 supported on the roll 13.. The guide foot 13 is mounted upon a rocker member 16 secured to the column by a pivot 17. The rocker i6 is oscillated to lift the guide foot 13 rearwardly and outwardly from the point of application at the comple tion of each rib applying operation in order to permit the knife to perform the severing operation.

A guideway 18 is supported from the column and contains a knife slide 19 carrying at its lower end a serrated knife blade 20. The guideway also carries a pair of pivoted gripping jaws 21. These are arranged to be closed upon the rib by inclined cam surfaces carried by United States Patent 0 f r 2,828,495 Patented Apr. 1," 1958 at a point close behind the gripping position of the jaws 21 as suggested in Fig. 2.

The feed slide is directly connected to a link 22 which, in turn, is connected to a rocker member 23 pivotally supported by the column 10 and connected through a short link to an arm 24 projecting forwardly from a shaft 25 journaled in the top of the column. The shaft 25, in turn, is connected to a lever arm 26 which projects rearwardly from the column and is itself held in an elevated initial position by a spring-operated rod 27 guided at its lower end by a boss projecting rearwardly from the column.

The lever arm 26 is connected through rods forming an adjustable link 28 to a second lever arm 29 pivotally mounted on the rear of the column 10. The lever arm 29 is, in turn, connected through a vertical rod 30 through an adjustable head 31 to the treadle rod 32 operated by a treadle 33 at the foot of the column.

The treadle rod 32 is connected through an adjustable head to an upper rod section 34 and this, in turn, is connected at its upper end to a switch arm 35 controlling a switch 36 in circuit with a solenoid 37 permanently secured to a bracket arm projecting rearwardly from the column 10. The core 38 of the solenoid is connected through a yoke 39 to the lever arm 29 which has been referred to above.

The shaft 25, in addition to the arm 24, has secured to it an upstanding arm so connected through a link 41 to the rocker member 16.. It will be seen that when the lever arm as is rocked in a counter-clockwise direction against the action of the spring 27 the knife slide will be advanced by its connections above described while the guide foot 13 will be moved in the opposite direction or retracted by the oscillation of the arm 40 acting through the link 41.

From the foregoing description it will be apparent that during the initial depression of the treadle 33 the knife slide 19 will be advanced to a point determined by the adjustable connections between the treadle and the lever arm 26. This point may be adjusted so that the gripper jaws 21 are brought into engagement with the rib of the stripping 14 and the knife blade located just above the stripping at approximately its point of engagement with the insole 15. When the knife and gripper jaws have reached this position, the switch arm 35 has been moved sufiiciently to trip the switch thus energizing the solenoid 3'7 and applying its full power to the further rocking of the lever arm 26. This causes the knife 20 to complete the rib severing operation under the power actuation of the solenoid and without further effort on the part of the operator. Upon release of the treadle the spring 27 returns the parts of the machine to their initial position and opens the switch 36.

Having thus disclosed my invention and described in detail a preferred embodiment thereof, 1 claim as new and desire to secure by Letters Patent:

1. In a rib applying machine having means for supporting an insole blank and means for delivering rib stripping for attachment thereto, cutting mechanism including a knife mounted for movement toward and from the attached rib, treadle operated means for advancing the knife toward the rib, and power operated knife actuating means arranged to be brought into action during the advancing movement of the knife for severing the rib stripping adjacent to the sole.

2. In a rib applying machine having means for supporting an insole blank and means for delivering rib stripping for attachment thereto, a slide mounted for movement toward and from the attached rib, a knife carried by the slide, treadle operated means for moving the slide toward the rib, and power means for operating the knife when the slide reaches a predetermined position.

3. Cutting mechanism for a rib applying machine comprising a knife slide carrying a knife and a pair of ribgripping jaws, treadle operated connections for advancing the slide and closing said jaws, and a solenoid operating through the said treadle connections for advancing the knife and severing the rib while held by the jaws.

4. A rib applying machine having a sole support, a knife-carrying slide movable toward and from an insole thereon, and mechanism for operating the knife slide comprising a treadle, a train of connecting mechanism between the treadle and knife slide, a solenoid cut into the connecting mechanism at an intermediate point, and a controlling switch for the solenoid also connected to the treadle.

5. A rib applying machine having a sole support, a knife-carrying slide movable toward and from a sole on said support, a spring holding the slide in an initial position remote from the sole, and mechanism for operating the knife slide comprising a treadle, a. lever arm and links connecting the slide to the lever and the lever to the treadle, a solenoid operatively connected to the lever arm, and a switch for the solenoid connected to the treadle.

No references cited. 

